What additive (fuel, oil, coolant, etc) do you swear by?

[Copterpilot]

Which swepco product are you using? Went to their site and there are a number of choices.

[Toptech360]

Has anyone tried this stuff? It was on sale so I figured wth I'm going to give it a shot.

Hyper lube makes some good stuff. I think iirc that that particular additive is one of the products that hyper lube is best known for.

Ive tried there zinc replacement additive which in due time i will send out for a used oil analysis on and compare it to the same oil minus additive. Apparently its a pretty fancy synthetic somthing or other called kenjetlube in Europe? Must be good right? Lol.

[msampsel]

Which swepco product are you using? Went to their site and there are a number of choices.

For the 911 tranny I use 201. However many of the 911 org dudes recommends a
chevron fluid which is dino based and costs less over the expensive swepco ... just FYI.
I used royal purple in the roadster and is was 16 bucks a liter.

Seems to shift fine, occasional gear grind shifting down to first all else if good (both vehicles 911 has 109K mile roadser ~ 50K on tranny).

[Natenate4s]

Sounds good Dan. I'll give an update on how it works for me. I'm in the process of flushing my cooling system. I'm planning on seeing my temp before and after I use it so I'll really know if there's a difference.

[Linda]

The Lucas TB Zinc oil additive for engine break in seems like good stuff.Reported to reduce tapping
sounds in the engine.
I wonder if any of these products could be used in the steering box?
Linda